html,body,#app{
    height: 100%;
}
body{
    margin: 0;
}
h1,h2,h3,h4,h5,h6{
    margin: 0;
    padding: 0;
}
ul{
    padding: 0;
    margin: 0;
    list-style: none;
}
*{
    margin: 0;
    padding: 0;
}
.icon {
width: 2em;
height: 2em;
vertical-align:middle;
fill: currentColor;
overflow: hidden;
margin-right: 1em;
}